Air-brake.



PATENTED APR. 14, 1908.

W. A. WBANT.

AIR BRAKE.

APPLICATION FILED JAN.28.1908.

atbouwo E Il y @911:11 zones W'ILLIAM A. WANT, OF MOOKSVILLE, NORTH CAROLINA.

AIR-BRAICE Specification of Letters Patent.

vPatented April 14, 190s. f

Application filed January 28, 1908. Serial No. 413,050.

To all who/m it may concern:

Be it known that 1, WILLIAM A. WEANT, a citizen of the United States, residing at Mocksville, in the county of Davie and State of North Carolina, have invented a new and useful Air-Brake, of which the following is a specification.

This invention relates to air brakes for rail-way cars and other rolling stock and more particularly to the construction of the brake cylinder. j

The object of the invention is to provide a brake cylinder in which the usual piston head and packing are dis ensed with, thereby to prevent leakage an render the brake more efficient in operation. i

A further object of the invention isto rovide a brake including telescopic mem ers 'connected by a flexible sleeve or tube which;

expands when fluid is admitted thereto and actuates the brake rod or stem to apply the brakes.

A further object of the invention is to provide means for returning the telescopic members automatically to normal positiony after each a plication of the brakes thereby to release t e brakes.

A still further object of the invention is Vgenerally to improve this class of devices so as to increase their utility, durability and p efficiency.

Further objects and advantages will appear in the following description7 it being understood that various changes in form, proportions and minor detail-s of construction may be resorted to within the scope of the ap ended claims.

n the accompanying drawings forming a part of this specliication: Figure 1 is a bottom plan view of an air brake constructed in accordance with 1n invention showing the same connected witlyi the brake rigging. Fig. 2 is an enlarged longitudinal sectional view of the brake cylinder detached, the telescopic members being shown in normal or inoperative position. Fig. 3 is a similar view showing the parts in extended or operative position.

Similar numerals of reference indicate corresponding parts in all of the figures of the drawings. f

The 1mproved air brake forming the subject matter of the present invention is prin cipally designed for attachment to freight cars, passenger cars and other rail-wa rolhng stock and in the present instance is s own in connection with a car of the ordinary construction in which 5 designates the truck wheels and 6 the brake shoes .connected through the medium of the usual rigging 7`v with the brake cylinder. j

The device consists of a cylindricalcasing or housing 8 in which is arrangedapair of telescopic members A 9 and 10, one of said members being stationary and the other movable to extended position, as shown.

The forward end of the stationary cylinder 9 is open while the` rear end 11 is pierced by a tube or pipe section 12 which communi- .cates with the train brake pipe 13 Ythrough the medium of a branch pipe 14. The mem-` ber 10 is slidably mounted in the member 9 and is provided at its forward end with a head 15 carrying a brake rod' or stem 16, the latter being extended through a bearing 17 in the adjacent end of the housing 8 and operatively connected with the brake rigging, as shown. The relatively stationary and movable members'9 and 10 are connected by an elastic sleeve 18 preferably formed of rubber and of a length equal to the length of said members when the latter are in contracted or inoperative position. One end of' the elastic sleeve 18 is secured to lthe head 15 of the movable'head 10 by meansof a retaining ring 'or cap 19, while the opposite end of the sleeve is secured to the head 11 of the stationary sleeve9 bya similar retaining ring or cap 20, thereby to firmly anchor the sleeve in both members. The annular flanges of the caps 19 and 20 bear against and force the adjacent side walls of the elastic sleeve 'in contact Awith the interior walls of the members 9 and 10 While the circular body portions of the retaining ca s engage the adjacent ends -of the elastic s eeve and force the latter against the heads 11 and 15.

The pipe section 12 projects a short distance within the elastic sleeve'18 and surrounding the projecting end of said pipe section 12 is one end of a coiled spring 21, the o posite end of which is fastened in any suitab e manner to a lug or extension 22 on the head 15 so that when the members 8 and 9 'are in extended position andthe air in the sleeve exhausted, he spring 21 will automatically return said members to contracted or inoperative osition thereby to release the brakes. One end) of the casin'gor housing 8 is threaded at 23 for engagement with a correspondhousing may be readily removed =-to expose the telescolpic members when thelatter need .matter to the working parts of the device.

It will'thus be seen that when air is admitted l i I I j through the pipe 12 to the interior of the .elastic sleeve 18 the latter will be forced longitudinally of the casing or housing and carry with it the brake rod 16 thus actuating the brake rigging to operate the brake shoes 6 in the usual manner, as best shown in Figs. 1 and 3 of ,the drawings.` When the air is exhausted from the flexible sleeve the spring 21 willV automatically return the parts to the sections when the fluid is exhausted from thi` position shown in F ig. 2 retractin ically re easing the brakes. Attention is of the drawings thus here called to the fact that the telescopic rstationary and movable telesco section 10 slides freely within the section 9, the elastic sleeve 'being effectually housed within the telescopic members or sections when the latter are in both operative and inoperative positions.

While the brake cylinder is shown in connection with the usual form of brake rigging it is obvious that the same may be used with equally good results on any other approved type of brake rigging.-

Having thus described the invention what is claimed is: j

1. A brake cylinder including telescopic sections, an elastic member connecting said sections, and a brake actuating member carried by and movable with one of the sections.

2. A brake cylinder including telescopic' sections, an elastic sleeve connecting said sections and normally housed within the same, a brake actuating member carried by and movable with one of the sections, and means for supplying fluid to the interior of the sleeve.

3. A brake'cylinder including vrelatively ic sections, an elastic sleeve connecting sai sections, a brake actuating member carried by the movable section, and a conductor4 rojectin within the elastic sleevefor supp yingy flui to the latter.

4. A brake cylinder including telescopic sections, a flexible member connecting said sections, a conductor for supplying fluid to the interior of the sleeve to move one of the sections to extended osition, a brake actuating member carrie by the movable section, and means` disposed within the sleeve for returning the movable section to retracted position when the fluid is exhausted from the sleeve.

5. A brake cylinder including relatively stationary and movable telescopic sections,

the brake rod 16 and automat-i an elastic sleeve connecting said sections, a conductor for su plying fluid under pressure to the interior orpthe sleeve, a brake actuating member carried by the movable section. and a casing forming a housing` for said sections.

6. A brake cylinder including a casing. relatively stationary1 and movable telescopicl sections disposed Within the casing, an elastic sleeve connecting said sections, a brake rod carried by the movable section, a conductor for supplying fluid under pressure to the interior o the elastic sleeve for extendimr .the movable section, and a spring dispose( within the elastic sleeve for retracting said sleeve.

7. A brake cylinder including relatively stationary and movable sections each having one end thereof open and its op osite end provided with a head, van elastic s eeve connecting the heads, retaining rings bearing against the elastic sleeve for locking the latter in engagement with the heads, a conductor piercing the head of one of the sections for admitting air to the interior of the sleeve, a brake rod carried by the head of the matin section, a lug projecting from the head of sai mating section, and a spring engaging the fluid conductor and lug, respectively, for retracting the movable section when the fluid is exhausted from the sleeve.

8. A brake cylinder including a casing having a removable closure, relatively stationary and movable telescopic sections arranged within the casing .and each havin one en d thereof open and its op osite en provided with a head, an elastic s eeve connecting said sections, retaining caps for securingthe adjacent ends of the elastic sleeve in engagement with the heads of the sections, said ca s being formed with annular flanges ada te to bear against the walls of the elastic s eeve, a pipe section piercing the head of one of the sections for supplying fluid' under pressure to the interior of the sleeve, a brake rod carried by the head of the mating section and extending through an o ening in the adjacent end of the casing, a ug projecting inwardly from the head of the mating section, and a coiled s ring disposed within the flexible sleeve an surrounding the fluid conductor and lug, respectively.

In testimony that I claim the foregoing as' my own, I have hereto aflixed my signature 1n the presence of two witnesses.

WILLIAM A. WEANT.

Witnesses: l

J. W. RODWELL, J. F. MOORE. 

